[INFO] cloning repository https://github.com/Justin-Morrison-github/json-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Justin-Morrison-github/json-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJustin-Morrison-github%2Fjson-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJustin-Morrison-github%2Fjson-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88fd6ea5e97eaa6acdc8dea35c36001042445c35
[INFO] checking Justin-Morrison-github/json-parser against try#c86ec274072509d26d0ee52682a0c94ed012ed89 for pr-153027
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJustin-Morrison-github%2Fjson-parser" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Justin-Morrison-github/json-parser
[INFO] finished tweaking git repo https://github.com/Justin-Morrison-github/json-parser
[INFO] tweaked toml for git repo https://github.com/Justin-Morrison-github/json-parser written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Justin-Morrison-github/json-parser on toolchain c86ec274072509d26d0ee52682a0c94ed012ed89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Justin-Morrison-github/json-parser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be253da5b10939f581ecaa03c61a99126223fa2b83f96db86eff0bc2585a3e92
[INFO] running `Command { std: "docker" "start" "-a" "be253da5b10939f581ecaa03c61a99126223fa2b83f96db86eff0bc2585a3e92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be253da5b10939f581ecaa03c61a99126223fa2b83f96db86eff0bc2585a3e92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be253da5b10939f581ecaa03c61a99126223fa2b83f96db86eff0bc2585a3e92", kill_on_drop: false }`
[INFO] [stdout] be253da5b10939f581ecaa03c61a99126223fa2b83f96db86eff0bc2585a3e92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+c86ec274072509d26d0ee52682a0c94ed012ed89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e6d56b919e0c1b5f81514b479a11b410168f894b5adc62c5ae949afa18f7c54
[INFO] running `Command { std: "docker" "start" "-a" "3e6d56b919e0c1b5f81514b479a11b410168f894b5adc62c5ae949afa18f7c54", kill_on_drop: false }`
[INFO] [stderr]     Checking json-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/main.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn parse_float(buf: &[u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `NeedMore` is never constructed
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum ParseResult {
[INFO] [stdout]    |      ----------- variant in this enum
[INFO] [stdout] 16 |     Done(usize),
[INFO] [stdout] 17 |     NeedMore,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Object`, `Array`, `Null`, and `None` are never constructed
[INFO] [stdout]   --> src/main.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum Value {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 27 |     Object(HashMap<String, Value>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 28 |     Array(Vec<Value>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 29 |     Null,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 30 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]   --> src/main.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn parse_float(buf: &[u8]) -> Result<(), std::io::Error> {
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `NeedMore` is never constructed
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum ParseResult {
[INFO] [stdout]    |      ----------- variant in this enum
[INFO] [stdout] 16 |     Done(usize),
[INFO] [stdout] 17 |     NeedMore,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Object`, `Array`, `Null`, and `None` are never constructed
[INFO] [stdout]   --> src/main.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | enum Value {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 27 |     Object(HashMap<String, Value>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 28 |     Array(Vec<Value>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 29 |     Null,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 30 |     None,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "3e6d56b919e0c1b5f81514b479a11b410168f894b5adc62c5ae949afa18f7c54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e6d56b919e0c1b5f81514b479a11b410168f894b5adc62c5ae949afa18f7c54", kill_on_drop: false }`
[INFO] [stdout] 3e6d56b919e0c1b5f81514b479a11b410168f894b5adc62c5ae949afa18f7c54